A relationship between diffusivity and cooperativity of supercooled liquids in the proximity of glass transition

被引：3

作者：

Ikeda, Masahiro ^{[1
]}

Aniya, Masaru ^{[2
]}

机构：

[1] Fukui Natl Coll Technol, Course Gen Educ Nat Sci Appl Phys, Sabae, Fukui 9168507, Japan

[2] Kumamoto Univ, Grad Sch Sci & Technol, Dept Phys, Kumamoto 8608555, Japan

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2014年 / 383卷

关键词：

Diffusivity; Viscous flow; Fractional Stokes-Einstein law; Cooperativity; TEMPERATURE-DEPENDENCE; SELF-DIFFUSION; FORMING LIQUIDS; IONIC LIQUIDS; MODEL; VISCOSITY; NAPHTHYLBENZENE; TRANSPORT; FRAGILITY; KINETICS;

D O I：

10.1016/j.jnoncrysol.2013.04.004

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In structurally disordered glass-forming liquids, the Stokes-Einstein (SE) law for translational diffusivity is violated, in particular, in the proximity of the glass transition temperature. Usually, the violation of the SE law is explained as due to the decoupling of the diffusivity from the viscous flow. Meanwhile, one of the prominent features observed in the supercooled liquids is the drastic increase of the viscosity with the decrease of temperature. The origin of the increase of the viscosity is attributed to the increase of the molecular motion cooperativity. In the present study, it is shown that the translational diffusivity of glass-forming liquids can be correlated with the cooperativity involved in the thermally activated viscous flow. In the present analysis, the cooperativity is defined in the framework of the bond strength-coordination number fluctuation (BSCNF) model of the viscosity. The result of the analysis suggests that the translational diffusivity is driven by the bond-breaking and bond-switching between the structural units that compose the network structure. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：44 / 48

页数：5

共 50 条

[1] Supercooled liquids and the glass transition
Pablo G. Debenedetti
Frank H. Stillinger
[J]. Nature, 2001, 410 : 259 - 267
[2] Supercooled liquids and the glass transition
Debenedetti, PG
Stillinger, FH
[J]. NATURE, 2001, 410 (6825) : 259 - 267
[3] An Ising Model for Supercooled Liquids and the Glass Transition
Chamberlin, Ralph, V
[J]. SYMMETRY-BASEL, 2022, 14 (10):
[4] Dynamics of supercooled liquids and understanding the glass transition
Das, Shankar P.
[J]. PHASE TRANSITIONS, 1994, 50 (1-3) : 7 - 19
[5] THERMODYNAMICS OF SUPERCOOLED LIQUIDS AND THEIR GLASS-TRANSITION
AGREN, J
[J]. PHYSICS AND CHEMISTRY OF LIQUIDS, 1988, 18 (02) : 123 - 139
[6] DYNAMICS OF SUPERCOOLED LIQUIDS AND THE GLASS-TRANSITION
BENGTZELIUS, U
GOTZE, W
SJOLANDER, A
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1984, 17 (33): : 5915 - 5934
[7] Theory of the viscosity of supercooled liquids and the glass transition: Fragile liquids
Rah, K
Eu, BC
[J]. PHYSICAL REVIEW E, 2003, 68 (05):
[8] Enhanced diffusivity in supercooled liquids
Richert, R.
Samwer, K.
[J]. NEW JOURNAL OF PHYSICS, 2007, 9
[9] Models of molecular cooperativity in liquids near the glass transition
Jackle, J
[J]. PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 1997, (126): : 53 - 60
[10] Supercooled liquids and the glass transition: Temperature as the control variable
Ferrer, ML
Lawrence, C
Demirjian, BG
Kivelson, D
Alba-Simionesco, C
Tarjus, G
[J]. JOURNAL OF CHEMICAL PHYSICS, 1998, 109 (18): : 8010 - 8015

← 1 2 3 4 5 →